Glace Bay Manufacturing fills orders by shipping directly to its customers using parcel shipment firms like UPS,
Question:
Glace Bay Manufacturing fills orders by shipping directly to its customers using parcel shipment firms like UPS, FedEx, and the US Postal Service. One measure of its supply chain responsiveness is order fulfillment lead time, which is the number of days from when the company receives an order to when it is delivered to the customer. The company's logistics manager has taken 15 samples of 7 orders each during a one month period. The recorded lead time for each observation is as follows:
Samples | Lead Time (Days) | ||||||
1 | 1.6 | 1.8 | 1.0 | 0.5 | 3.3 | 1.1 | 0.6 |
2 | 4.1 | 3.3 | 0.2 | 2.0 | 5.5 | 2.1 | 0.3 |
3 | 1.6 | 4.5 | 2.3 | 0.9 | 0.9 | 1.6 | 0.9 |
4 | 2.9 | 3.3 | 1.8 | 4.1 | 1.5 | 0.5 | 1.5 |
5 | 0.3 | 1.8 | 5.7 | 3.3 | 4.7 | 3.6 | 0.5 |
6 | 2.6 | 3.9 | 3.3 | 3.5 | 1.5 | 4.7 | 0.9 |
7 | 3.9 | 6.1 | 1.1 | 3.0 | 2.8 | 2.5 | 2.3 |
8 | 3.4 | 3.2 | 2.5 | 2.1 | 1.2 | 3.5 | 5.1 |
9 | 1.2 | 2.8 | 3.1 | 2.5 | 0.4 | 4.4 | 2.9 |
10 | 6.6 | 4.4 | 0.9 | 3.0 | 5.0 | 0.8 | 3.5 |
11 | 1.8 | 3.5 | 2.4 | 2.8 | 4.1 | 1.9 | 4.3 |
12 | 2.0 | 5.9 | 3.4 | 0.7 | 2.5 | 6.1 | 3.5 |
13 | 4.9 | 7.0 | 5.9 | 2.9 | 4.8 | 2.1 | 6.8 |
14 | 3.5 | 6.9 | 4.9 | 6.6 | 1.3 | 0.1 | 5.9 |
15 | 6.3 | 1.9 | 5.8 | 3.9 | 4.4 | 4.9 | 2.6 |
Construct an x¯ chart AND an R-chart using 3σ limits for this data and use these to indicate if the process is in control. Based on your analysis, explain why the process is or isn't in control.
Expert Answer:
International Business Competing in the Global Marketplace
ISBN: 978-1259578113
11th edition
Authors: Charles W. L. Hill
